Liu Gongquan was often criticized by his teacher and father for his poor handwriting when he was a child. He listened to their teachings with an open mind. After a year of hard work, his calligraphy has made great progress and was praised by the teacher. The number of praises has increased, and Liu Gongquan also feels great. One day, Liu Gongquan and several friends held a big print writing competition. He quickly wrote an article, thinking that he would definitely win the championship, and his face showed a smug look. An old man selling tofu saw that Liu Gongquan was so immodest and wanted to throw some cold water on him. He went up to him and said, "There is a man who writes with his feet in Huayuan City, and he writes better than you." Liu Gongquan was a little unconvinced and arrived at Huayuan City early the next morning. He saw with his own eyes that the old man with a broken arm was pressing the paper lying on the ground with his left foot, and his right foot was holding a writing brush. He was writing couplets while flying, and the words he wrote were many times better than those he didn't know. He calmed down and thought his little achievements were nothing. He sincerely said to the armless old man, "Liu Gongquan is willing to worship you as a teacher and ask the teacher to tell the students the secret of writing." The armless old man pondered for a moment and wrote him four sentences: "Write eight jars of water, and the inkstone will blacken the waterlogged pool, and the dragon and phoenix will win over a hundred parents before flying." The old man explained, "This is the secret of my writing. I have practiced writing with my feet for more than 50 years. I used eight cylinders of water mill ink to practice calligraphy. After writing every day, I wash the inkstone in a pond of half an acre, and the water in the pond is dyed black. But the sky is behind, the mountains are behind, and my handwriting is far from perfect! " Liu Gongquan firmly remembered the old man's words. Since then, he has practiced calligraphy more diligently. He collected many ancient calligraphers' words, pondered them repeatedly and absorbed the strengths of various schools. He often visited the famous calligraphers at that time and asked for advice modestly. He also often looks for classmates, relatives and strangers to point out his shortcomings in calligraphy. Liu Gongquan studied tirelessly in the field of calligraphy and finally became a famous calligrapher at that time.